<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        table {
            border: 1px rgb(124, 170, 239) solid;
            /* 把边框改成细线 */
            border-collapse: collapse;
        }
    </style>
</head>

<body>
    <table border="1">
        <tr>
            <td>id</td>
            <td>姓名</td>
            <td>年龄</td>
        </tr>
        <tr>
            <td>001</td>
            <td>张老板</td>
            <td>23</td>
        </tr>
    </table>
</body>

</html>